December weather forecastFairfield, CT
December
Weather in December
December is synonymous with the arrival of winter in Fairfield, Connecticut, with the cold intensifying from the chilly November weather. Light snowfall begins to cover the local landscape, providing the city with a festive, wintery appearance. Despite the cold, Fairfield exudes a warm and welcoming atmosphere in preparation for the holiday season. The extended dark hours are brightened by holiday lights, creating a picturesque setting across the city. December tops the chart for average rainfall recording 4.21" (107mm), the highest of any other month of the year.Temperature
As December commences, the average high-temperature shows a reduction, transitioning from a cool 50.9°F (10.5°C) in November to a cold 41.9°F (5.5°C). In Fairfield, the December nights are characterized by an average low-temperature of 33.3°F (0.7°C), a minor dip from daytime readings.Humidity
In Fairfield, the average relative humidity in December is 75%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.7 days and typically aggregates up to 4.21" (107mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Fairfield. In Fairfield, during December, snow falls for 4.3 days and regularly aggregates up to 1.81" (46mm) of snow. In Fairfield, during the entire year, snow falls for 24.9 days and aggregates up to 9.41" (239mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December in Fairfield, sunrise is at 6:59 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:34 pm EST.
Sunshine
February and December, with an average of 4.8h of sunshine, are months with the least sunshine in Fairfield.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Fairfield. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 2 during December leads to these advisories:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Experience reduced UV exposure by about half when donning a wide-brim hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fairfield, CT
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in December
Fairfield, CT
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Fairfield, CT
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Fairfield, CT
- Average humidity in December: 75%
The months with the highest relative humidity are May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in December
Fairfield, CT
- Average rainfall in December: 4.21"
The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is January (2.48").
Average rainfall days in December
Fairfield, CT
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in December
Fairfield, CT
- Average snowfall in December: 1.81"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Fairfield, CT
- Average snowfall days in December: 4.3 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fairfield, CT
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Fairfield, CT
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Fairfield, CT
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Fairfield, CT
- Average cloud cover in December: 48
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Fairfield, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
